When you say you are deluged with messages, do you mean emails, or are you reading the logs and seeing the entries there? If just in the logs, never mind. SME expects 2 disks and RAID1, and considers a single disk system to be a degraded RAID1 array.
If it is emails, then ....Hmmmm...can't help you there. Hope someone else can.
BTW, why get rid of the second disk?....RAID1 is a great safety net.
Cheers
Ian